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Gregg Irwin greggirwin

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greggirwin /
Created Jul 10, 2020
View/flags demo, showing what window flags are available.
Red []
window-flags: [
resize no-title no-border no-min no-max no-buttons modal popup
show-win-using-flags: func [flags [block!]][
view/flags [backdrop sky button "OK" [unview]] flags
spec: [
greggirwin /
Created Jun 12, 2020
Minimal sorted series support, allowing fast binary searches.
Red [
comment: {
Minimal sorted series support, allowing fast binary searches.
I tinkered with a "dialected" interface, and more support
functions, like `[remove take at index?]` but quickly saw
that they were of little value, and that using a parameter
for the command was downright misleading to read, no matter
how clever the implementation. `Find` is not strictly
necessary either, but it does make it nicely consistent
greggirwin /
Created May 23, 2020
Old R2 `step` function, ported to Red, for incrementing alpha-numeric strings.
Red []
step-ctx: context [
digit=: charset [#"0" - #"9"]
alpha=: charset [#"A" - #"Z" #"a" - #"z"]
alpha-num=: union alpha= digit=
; Could do this with charsets.
range-start-char?: func [val] [to logic! find "0Aa" val]
greggirwin /
Last active May 23, 2020
Old experiments in dynamically refined function calls
filter: function [
"Returns two blocks: items that pass the test, and those that don't."
series [series!]
test [any-function!] "Test (predicate) to perform on each value; must take one arg"
/only "Return a single block of values that pass the test"
result: reduce [copy [] copy []]
foreach value series [
append/only pick result make logic! test :value :value
greggirwin /
Created May 13, 2020
Non-local timing markers
time-marks: object [
data: #()
;!! Watch for [set clear] system word usage in this object!
set: func [key] [
either key = /all [
print ["##ERROR time-marks/set reserves /all as an internal key."]
greggirwin /
Created Aug 5, 2019
Red Load-Time and Type Tally
Red [
purpose: {
Load a Red file, noting how long it takes to do so,
then parse it and tally all the values by datatype.
It's not a metric that may prove useful, but in
aggregate, we could see what types are most commonly
I'll correct my own thinking. After just a few sample
greggirwin /
Last active Sep 1, 2019
VID across/below alignment demo
Red []
view [
style chk: check "Option" data yes
style vline: base 2x60 red
across top vline button "Ok" text "Text" field chk return
across middle vline button "Ok" text "Text" field chk return
across bottom vline button "Ok" text "Text" field chk
View r2-mapping-lib.r
;!! This is very much a work in progress, with many things untested. It needs
; to be clear what is functional and break out R&D bits into a working script
; for that purpose.
Arcsin: func [X [decimal!]] [
;'Arcsin(X) = Atn(X / Sqr(-X * X + 1)) [from MS Help - VB4, 1995]
Re: WRT: func ['name content][]
WRT incr {
The most common case will be to change state, but incr does add meaning, and has
benefits, in my mind, when used with scalars.
- By default, there is no step value, so you can't get the + 1 part wrong.
- Incr is often used when looping, making loop variables stand out from other add
ops that might be in expressions.
greggirwin /
Last active Oct 24, 2018
RFC3986 URL parser and separate tests
Red []
test-urls: reduce [
foo:// ; no path
object [
scheme: 'foo
user-info: none
host: "" ; none ; this is tricky, the // means we'll always have a host, even if empty.
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